Return Error when try to run node-pre-gyp

```
grpc@1.24.2 install /mnt/c/Users/500401/Documents/firebase/quickstart-nodejs/firestore-emulator/javascript-quickstart/node_modules/grpc
> node-pre-gyp install --fallback-to-build --library=static_library

node-pre-gyp WARN Using request for node-pre-gyp https download
node-pre-gyp WARN Pre-built binaries not installable for grpc@1.24.2 and node@10.16.3 (node-v64 ABI, glibc) (falling back to source compile with node-gyp)
node-pre-gyp WARN Hit error self signed certificate in certificate chain
gyp WARN install got an error, rolling back install
gyp ERR! configure error
gyp ERR! stack Error: self signed certificate in certificate chain
gyp ERR! stack at TLSSocket.onConnectSecure (_tls_wrap.js:1058:34)
gyp ERR! stack at TLSSocket.emit (events.js:198:13)
gyp ERR! stack at TLSSocket._finishInit (_tls_wrap.js:636:8)
gyp ERR! System Linux 4.4.0-43-Microsoft
gyp ERR! command "/home/jairorudas/.nvm/versions/node/v10.16.3/bin/node" "/home/jairorudas/.nvm/versions/node/v10.16.3/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "configure" "--fallback-to-build" "--library=static_library" "--module=/mnt/c/Users/500401/Documents/firebase/quickstart-nodejs/firestore-emulator/javascript-quickstart/node_modules/grpc/src/node/extension_binary/node-v64-linux-x64-glibc/grpc_node.node" "--module_name=grpc_node" "--module_path=/mnt/c/Users/500401/Documents/firebase/quickstart-nodejs/firestore-emulator/javascript-quickstart/node_modules/grpc/src/node/extension_binary/node-v64-linux-x64-glibc" "--napi_version=4" "--node_abi_napi=napi" "--napi_build_version=0" "--node_napi_label=node-v64"
gyp ERR! cwd /mnt/c/Users/500401/Documents/firebase/quickstart-nodejs/firestore-emulator/javascript-quickstart/node_modules/grpc
gyp ERR! node -v v10.16.3
gyp ERR! node-gyp -v v5.0.5
gyp ERR! not ok
node-pre-gyp ERR! build error
node-pre-gyp ERR! stack Error: Failed to execute '/home/jairorudas/.nvm/versions/node/v10.16.3/bin/node /home/jairorudas/.nvm/versions/node/v10.16.3/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js configure --fallback-to-build --library=static_library --module=/mnt/c/Users/500401/Documents/firebase/quickstart-nodejs/firestore-emulator/javascript-quickstart/node_modules/grpc/src/node/extension_binary/node-v64-linux-x64-glibc/grpc_node.node --module_name=grpc_node --module_path=/mnt/c/Users/500401/Documents/firebase/quickstart-nodejs/firestore-emulator/javascript-quickstart/node_modules/grpc/src/node/extension_binary/node-v64-linux-x64-glibc --napi_version=4 --node_abi_napi=napi --napi_build_version=0 --node_napi_label=node-v64' (1)
node-pre-gyp ERR! stack at ChildProcess. (/mnt/c/Users/500401/Documents/firebase/quickstart-nodejs/firestore-emulator/javascript-quickstart/node_modules/grpc/node_modules/node-pre-gyp/lib/util/compile.js:83:29)
node-pre-gyp ERR! stack at ChildProcess.emit (events.js:198:13)
node-pre-gyp ERR! stack at maybeClose (internal/child_process.js:982:16)
node-pre-gyp ERR! stack at Process.ChildProcess._handle.onexit (internal/child_process.js:259:5)
node-pre-gyp ERR! System Linux 4.4.0-43-Microsoft
node-pre-gyp ERR! command "/home/jairorudas/.nvm/versions/node/v10.16.3/bin/node" "/mnt/c/Users/500401/Documents/firebase/quickstart-nodejs/firestore-emulator/javascript-quickstart/node_modules/grpc/node_modules/.bin/node-pre-gyp" "install" "--fallback-to-build" "--library=static_library"
node-pre-gyp ERR! cwd /mnt/c/Users/500401/Documents/firebase/quickstart-nodejs/firestore-emulator/javascript-quickstart/node_modules/grpc
node-pre-gyp ERR! node -v v10.16.3
node-pre-gyp ERR! node-pre-gyp -v v0.14.0
node-pre-gyp ERR! not ok
Failed to execute '/home/jairorudas/.nvm/versions/node/v10.16.3/bin/node /home/jairorudas/.nvm/versions/node/v10.16.3/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js configure --fallback-to-build --library=static_library --module=/mnt/c/Users/500401/Documents/firebase/quickstart-nodejs/firestore-emulator/javascript-quickstart/node_modules/grpc/src/node/extension_binary/node-v64-linux-x64-glibc/grpc_node.node --module_name=grpc_node --module_path=/mnt/c/Users/500401/Documents/firebase/quickstart-nodejs/firestore-emulator/javascript-quickstart/node_modules/grpc/src/node/extension_binary/node-v64-linux-x64-glibc --napi_version=4 --node_abi_napi=napi --napi_build_version=0 --node_napi_label=node-v64' (1)
npm WARN cloud-firestore-emulator-javascript-quickstart@1.0.2 No repository field.
npm WARN cloud-firestore-emulator-javascript-quickstart@1.0.2 No license field.

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! grpc@1.24.2 install: `node-pre-gyp install --fallback-to-build --library=static_library`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the grpc@1.24.2 install script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
```

Start by reproducing npm install in the firestore-emulator/javascript-quickstart environment using Node v10.16.3, then follow the node-pre-gyp fallback into node-gyp and the reported self-signed certificate error. The issue names no source file or test; done would require identifying a reproducible cause and confirming that the grpc dependency installs successfully.

由索引模型根据 Issue 内容生成。